CN103039102A - Frequency selection and transition over white space - Google Patents
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- CN103039102A CN103039102A CN2011800240160A CN201180024016A CN103039102A CN 103039102 A CN103039102 A CN 103039102A CN 2011800240160 A CN2011800240160 A CN 2011800240160A CN 201180024016 A CN201180024016 A CN 201180024016A CN 103039102 A CN103039102 A CN 103039102A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W72/02—Selection of wireless resources by user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/06—Reselecting a communication resource in the serving access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/27—Control channels or signalling for resource management between access points
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Abstract
A method of wireless communication includes determining at least one neighboring apparatus from which to obtain information, obtaining information related to a plurality of channels from the at least one neighboring apparatus, selecting a channel from the plurality of channels based on the obtained information, and transmitting on the selected channel.
Description
Technical field
Put it briefly, following description relates to radio communication, and specifically, the frequency that relates on the white space is selected and conversion.
Background technology
White space refers on a lot of geographical position not the frequency spectrum that technology/main users is used by any mandate.When not having main users, this frequency spectrum can be used by any other user (that is, Secondary Users) who uses any technology.Fundamentally being different from more tradition in upper wide area network (WAN) deployment for less important use of white space frequency (or cognitive frequency) disposes, this is because two fundamental causes: a) because the existence of main users (such as TV signal or wireless microphone), identical frequency (or channel) may not can all is available in all positions; And b) identical channel is shared by the various device that use to produce spatially with the different technologies of the upper jamming pattern that changes of time.Even in Local Area Network is disposed, use the equipment of different technologies to cause significant interference to the white space on this frequency owing to the propagation characteristic on the lower frequency.For example, during the traditional WLAN on the 2.4GHz frequency disposed, signal was significantly decayed on long distance and when passing wall, thereby allows different Secondary Users to coexist in its overlay area.Yet on the VHF/UHF frequency band, signal on long distance and when passing wall decay very little, thereby can between Secondary Users, produce significantly interference.
This forces WAN/LAN to use local available frequency, and is subject to the less interference from miscellaneous equipment.At wireless WAN/LAN(WWAN/WLAN) in the environment, each base station (BS) (or access point) can be considered as selecting being best suited near the main equipment of the frequency of the mobile radio station it.Each BS has: down link (DL) overlay area, this DL overlay area are the adjacent domains around this BS, and therein, mobile radio station (MS) can be decoded when occurring from the minimum-rate transmission of this BS; And up link (UL) overlay area therein, can send to this BS with minimum-rate when MS occurs.The jamming pattern that cause based on selected frequency with because of the unknown device of sharing same frequency DL and UL overlay area.
In concept, dynamic frequency selection (DFS) is the approach that main equipment selection observes the low available channel that disturbs therein.Yet the actual design of DFS agreement is owing to the limited information that can use entity related in the DFS decision-making treatment proposes various challenges.
Summary of the invention
Aspect of present disclosure, a kind of method of radio communication comprises: determine at least one neighboring devices from its acquired information; From the information of described at least one neighboring devices acquisition about a plurality of channels; From described a plurality of channels, select a channel based on the information that obtains; And send at selected channel.
Aspect of present disclosure, a kind of device for radio communication comprises: for determining from the module of at least one neighboring devices of its acquired information; Be used for from the module of described at least one neighboring devices acquisition about the information of a plurality of channels; Be used for selecting from described a plurality of channels based on the information that obtains the module of a channel; And for the module that sends at selected channel.
Aspect of present disclosure, a kind of computer program comprises computer-readable medium.Described computer-readable medium comprises the code for following operation: determine at least one neighboring devices from its acquired information; From the information of described at least one neighboring devices acquisition about a plurality of channels; From described a plurality of channels, select a channel based on the information that obtains; And send at selected channel.
Aspect of present disclosure, a kind of device for radio communication comprises treatment system.This treatment system is configured to: determine at least one neighboring devices from its acquired information; From the information of described at least one neighboring devices acquisition about a plurality of channels; From described a plurality of channels, select a channel based on the information that obtains; And send at selected channel.
Description of drawings
Fig. 1 is the block diagram that the hardware configuration of exemplary means is shown.
Fig. 2 is the figure that illustrates about two problems of DFS.
Fig. 3 A is the figure that the first deployment scenario is shown.
Fig. 3 B is the figure that the second deployment scenario is shown.
Fig. 4 A is another figure that the first deployment scenario is shown.
Fig. 4 B is another figure that the second deployment scenario is shown.
Fig. 5 is the figure that the Candidate Frequency tabulation is shown.
Fig. 6 is the figure that the change of frequency of operation is shown.
Fig. 7 is the flow chart of illustrative methods.
Fig. 8 is the figure of frequency (carrier wave) that transmission is shown.
Fig. 9 is another flow chart of illustrative methods.
Figure 10 is the module map of exemplary means.
Embodiment
More fully the system of novelty, the various aspects of apparatus and method are described with reference to accompanying drawing hereinafter.Yet the disclosure of instructing can embody with multiple different form, and should not be interpreted as being limited to and run through any concrete structure or the function that present disclosure provides.On the contrary, provide these aspects so that present disclosure with detailed and complete, and will be passed on to those skilled in the art the scope of present disclosure fully.Instruction based on this paper, those skilled in the art should be realized, the scope of present disclosure is intended to contain the system of novelty disclosed herein, any aspect of apparatus and method, no matter and be independent that realize or realize in conjunction with any other side of the present invention.Implement device or can hands-on approach is come in the aspect of any amount that for example, can set forth with this paper.In addition, scope of the present invention is intended to contain this device or the method that realizes with other structure, function or 26S Proteasome Structure and Function except the various aspects of the present invention that this paper sets forth or that be different from the various aspects of the present invention of this paper elaboration.Should be understood that, can will usually embody any aspect disclosed herein by the one or more of claim.
The example that is applicable to merge the device of various aspects of the present invention comprises, but be not limited in the mobile radio station that can operate in wireless network.Mobile radio station can be called as subscriber equipment, mobile phone, user terminal, wireless terminal, mobile device, subscriber station, wireless device, radio node, terminal, accesses terminal, node, handheld device or some other suitable terms.Run through the described various aspects of the application and be intended to be applied to all suitable devices, and do not consider its concrete name.Similarly, the base station can be called as any device of the control and management in access point, some coordination entity or the responsible wireless network.
Provide the various aspects of device referring now to Fig. 1.Fig. 1 is the conceptual block diagram that the hardware configuration of device is shown.Device 100 comprises processor 104, is coupled to the machine readable media (memory) 108 of processor 104 and the transceiver 106 that is coupled to processor 104.Processor 104 and machine readable media 108 can be called treatment system 110 jointly.Yet for some processor 104 configuration, treatment system 110 can comprise the processor 104 that does not have machine readable media 108.
Machine readable media 108 can comprise the memory that is integrated into one or more processors.Machine readable media 108 can also comprise the memory of this one or more processors outside, such as random-access memory (ram), flash memory, read-only memory (ROM), programmable read-only memory (prom), erasable PROM(EPROM), register, hard disk, portable hard drive, CD-ROM, DVD or any other suitable memory device.In addition, machine readable media 108 can comprise transmission line or the carrier wave of encoded data signal.Those skilled in the art should be realized that the described function that realizes how best treatment system.
Fig. 2 shows the Figure 200 about two problems of DFS.First problem is about initialization.Suppose that BS 202 is not connected to its MS.In legacy system, BS 202 is broadcast pilot or signature waveform on a known frequency channel.MS determined the intensity of the signature waveform on all channels before it is connected to BS 202.Yet when the feedback that lacks from the MS in its overlay area, BS 202 can't know the optimum channel that will use in advance in available channel.Determine to represent separately the channel strength at MS place at the optimum channel at BS place.An obvious solution is broadcasting multisignatures sequence on each available clear channel.Yet this broadcasting is but run counter to desire, and this is owing to its consumed power and on each channel other white space equipment to be produced interference.Second Problem is about from the dynamic change on the demand of serving BS broadcasts 202.Suppose that BS 202 is connected to MS 204 and MS 206.MS 204 may enter the zone from the interference increase of miscellaneous equipment.Have the new MS(MS 208 with the less road strength loss of BS 202) may want to be connected to BS 202.If BS 202 utilizes the frequency that is not suitable for MS 204 and MS 208 to serve this MS, MS 204 and MS 208 how to confirms are more suitable for its new channel that needs so, how MS 208 sends its signal strength signal intensity to BS202, can and but how BS 202 change in frequency of operation in the situation of the call quality of not upsetting MS 206? in the situation that Frequency Division Duplexing (FDD) (FDD) WWAN/WLAN disposes, need to solve this two problems for DL and UL.
Deployment scenario
Fig. 3 A is Figure 30 0 that the first deployment scenario is shown.The first deployment scenario (it can be called " greenery patches (greenfield) operation ") is in the upper a kind of scene that WWAN/WLAN 306 is deployed between other WWAN/WLAN station 302,304 of dummy frequencies (for example, TV UHF frequency band).Dummy frequencies is unauthorized frequency band.MS 308 communicates by letter with WWAN/WLAN306 by the service provider, this service provider does not have the frequency spectrum (that is the macro base station that, does not receive and send and have for this service provider at the frequency band of permitting) of license in this deployment region in deployment region.
Fig. 3 B is Figure 35 0 that the second deployment scenario is shown.Wireless deployment on the frequency that is characterized as the existence license of the second deployment scenario (it can be called " capacity unloading and femto are disposed ").In the second deployment scenario, on the white space and MS 308 BS 306 that receives and send be deployed between the grand BS 312,314, BS 312,314 frequency bands in license receive and send and had (thereby also by its control) for the service provider of BS 306.Frequency on the frequency band of license will be called the anchor point frequency, and in the grand BS entity 312 of physics, 314 each can be called anchor point BS.The capacity unloading is that the focus on the white space is disposed.The BS entity 306 that receives and send at white space will be called cognitive BS, and selected frequency will be called cognitive frequency.When the availability of cognitive carrier wave was uncertain, the anchor point carrier wave was reliable.It is the special circumstances of capacity unloading that femto is disposed, and in this case, BS 306 is positioned at building and sends with the similar antenna height of the antenna height of lower-wattage utilization and MS entity.
Cognitive BS can put altogether also and can not put altogether with anchor point BS with anchor point BS.Any solution that can be applicable to the first deployment scenario (Fig. 3 A) also can be applicable to the second deployment scenario (Fig. 3 B), and this is because the access right to the additional information that is provided by anchor point BS 312,314 will be provided cognitive BS 306.Therefore, the availability of anchor point BS provides simpler and has substituted more reliably.
Initialization
Fig. 4 A is another Figure 40 0 that the first deployment scenario is shown.Fig. 4 B is another Figure 45 0 that the second deployment scenario is shown.Fig. 5 is Figure 50 0 that the Candidate Frequency tabulation is shown.With reference to Fig. 4 A, in the first deployment scenario (that is, the greenery patches operation), BS 306 obtains (1) by neighbor bss 302,304 selected frequencies, and (2) and frequency sets f
SetThe interference that is associated (that is, energy).About information (1), if their connect can to send BS 306(to by backhaul by neighbor bss 302,304 selected frequencies), perhaps can by sensing wireless medium and identification by those neighbor bss 302,304 employed frequency set is incompatible knows.In order to know by the sensing wireless medium, BS 306 can be to decoding from broadcast channel or some signature sequences of neighbor bss 302,304 the ID that comprises BS.About information (2), can be from other base station or obtain and frequency sets f from the fixed reception antenna (such as antenna 310) of the height (approximately 2m is high) of MS
SetIn the interference/energy of each frequency dependence connection.Antenna 310 can be deployed in the immediate area of BS 306, and each frequency f place that can be in available white space is (that is, at frequency sets f
SetIn each frequency f place) measuring frequency set f
SetOn interference.For example, although the transmitting antenna of BS 306 around 10-15m overhead, reception antenna 310 can be installed in from the height of the BS 306 residing about 2m in ground.When receiving information (2) from another base station, this frequency sets f
SetCan be the result of the LCF that constructed by this base station, this base station can be another cognitive base station.
With reference to Fig. 5, utilize from neighbor bss 302,304 information that obtain and the interfere information that obtains from antenna 310, BS 306 can create to disturb or cause Candidate Frequency tabulation (LCF) 500 of incremental order of the possibility of interference.It should be noted that LCF can be by any entity set-up on the network that represents BS 306, as long as information can be delivered to this entity by backhaul.Can sort to this tabulation with any various ways.In one example, can be based on being that this frequency is distributed a numerical value for the interference of each frequency measurement, and if neighbor bss using this frequency then can deduct an amount from this numerical value.Can frequency sets be sorted based on drawn numerical value.More specifically, characteristic frequency may not disturbed, thereby and distribute 10, if but two adjacent base stations are using this characteristic frequency, then can deduct-1 for each base station of these two adjacent base stations, thereby be provided as 8 summation, it can be used for comparing in order to sort at LCF with other Candidate Frequency.
In case sort, because the possibility of the interference of the interference that observes or prediction is higher than endurable threshold value, the possibility that therefore will wherein disturb or disturb removes from LCF greater than the frequency f of threshold value.As shown in Figure 5, for the possibility with the interference that is higher than threshold value or interference and remove frequency F
e
According to the needs of network, can utilize information (1) (that is, by the selected frequency of neighbor bss) to realize following two opposite targets:
A) (or using minimum) frequency that selection is not used by neighbor bss from LCF.The method has reduced the interference effect of neighbor bss, and when target be preferred when increasing the overlay area of the BS belong to identical network.
B) from LCF, select to use maximum frequencies by neighbor bss.This can be to carry out when switching between the frequency that reduces in the height mobile network deployment scenario in target.This class is disposed and is helped the Internet Service Provider to provide higher mobility take the interference that increases the minizone as cost.
Suppose that only partial information can be used for BS 306, algorithm as discussed above can easily be suitable for.For example when lacking information (1), the frequency of (as being measured by antenna 310) that BS 306 can select to have minimum measurements interference.Similarly when lacking information (2), LCF can be with from using the minimum tabulation to tactic all usable frequencies of using maximum frequencies, and BS 306 can according to target a) or b) select frequency.Exist information (1) and (2) both the time, BS 306 can select the top candidate person among the LCF, supposes that this frequency is to sort by priority by being equilibrated at the information that receives in (1) and (2).Above-described initialization algorithm can also be used for the situation (for example Femto cell deployment) of unplanned user's deployment model, and in unplanned user's deployment model, BS is portable set.
With reference to Fig. 4 B, in the second deployment scenario (that is, capacity unloading and femto are disposed), can be by using the algorithm that comes the selection of refining frequency from being connected to information that anchor point BS 312,314 MS 308 collect.Each cognitive BS 306 safeguards the tabulation of the anchor point BS that is associated.If in " expectation " overlay area of cognitive BS 306, can decode reliably from the transmission of anchor point BS, then this anchor point BS is in described tabulation.Because the overlay area of cognitive BS 306 is according to the jamming pattern on the dummy frequencies of operation, so term " expectation " wishes that for describing the Internet Service Provider cognitive BS 306 can provide the DL/UL overlay area of reliability services.
For cognitive BS 306, there is various ways to create and safeguards anchor point BS tabulation.In one example, this tabulation comprises anchor point BS as follows:
I. in the situation of the deployment of planning (referring to Fig. 4 B), the position of anchor point BS and cognitive BS and overlay area are known.Obvious when overlapping when having in the overlay area of these two BS, can add anchor point BS to tabulation.Therefore, as shown in Fig. 4 B, add anchor point BS 312,314 to tabulation.
II. in the situation of planless deployment, at cognitive BS 306 places, at the frequency place of license to comprising anchor point BS 312,314 from different anchor point BS() the intensity of reception signal measure.This signal strength signal intensity can be measured by the reception antenna (such as antenna 310) that is installed in Recognition distance BS 306 residing ground and locates the At The Height of about 2m.If the signal strength signal intensity from anchor point BS is higher than threshold value, then add this anchor point BS to tabulation.In this configuration, if the signal strength signal intensity of anchor point BS 312 is higher than predetermined threshold value, but the signal strength signal intensity of anchor point BS 314 is lower than this predetermined threshold value, then adds BS 312 to tabulation, and does not add BS 314 to tabulation.
The size of the tabulation of the anchor point BS that is associated can be controlled at the largest amount that the intensity that only comprises to be higher than the prearranged signal intensity threshold receives the anchor point BS of its signal, and this prearranged signal intensity threshold is higher than from the signal strength signal intensity of the anchor point BS in tabulation not.
The given anchor point BS tabulation that is associated, except information as discussed above (1) and (2), cognitive BS 306 can also obtain following information (3): cognitive BS 306 receives the set of candidate's dummy frequencies of expectation by backhaul each anchor point BS from its linked list.Anchor point BS measures and report frequency sets f by the MS that request is connected to this BS
SetOn interference obtain the Candidate Frequency tabulation of this expectation.In order to reduce the measurement expense of the MS that is connected to anchor point BS, cognitive BS 306 can offer LCF the anchor point BS that is associated, and cognitive BS 306 wishes to obtain more information by this anchor point BS.Can will have been reported that by the many MS that are connected to anchor point BS the frequency that the high interference value is arranged removes thereon from the Candidate Frequency tabulation.
Referring again to Fig. 4 A, cognitive BS 306 can also be from adjacent cognitive BS 302,304 acquired informations (3).In this configuration, cognitive BS 306 receives the tabulation of the dummy frequencies of expectation from cognitive BS 302,304 in backhaul.Cognitive BS 302,304 measures and reports the Candidate Frequency tabulation that the interference on this frequency sets obtains to expect by the MS 308 that asks each cognitive BS to communicate by letter with it.Cognitive BS 302,304 can report the information of acquisition, perhaps can construct LCF and the LCF that constructs is reported to cognitive BS 306.
Give the amended modified LCF fix on based on the information that receives from the anchor point BS that is associated, cognitive BS 306 can performing step (a) or (b) is selected frequency.In the situation of FDD system, for the selection of DL and UL frequency, initialization step is similar.
The change of operating frequency
Fig. 6 is Figure 60 0 that the change of operating frequency is shown.Suppose that cognitive BS 306 has selected the DL frequency f
oAnd be connected to MS 316 and MS 318 by this frequency.Frequency f
oIt is operating frequency.Cognitive BS 306 is just in frequency f
oUpper transmission pilot tone or signature waveform.
May be hopeful to be connected to other mobile radio station (such as MS 320) of cognitive BS 306, yet owing to the high interference from miscellaneous equipment, in frequency f
oThe place may have the covering leak.In order to be transformed into different operating frequencies, cognitive BS 306 must guarantee that itself and MS 316 be connected with MS is connected and does not affect adversely or because this change and being broken.
Fig. 7 is the flow chart 700 of illustrative methods.
The first step: in the first step 702, cognitive BS 306 can periodically obtain all information as discussed above (1), (2) and (3).Have anchor point BS(such as anchor point BS 312,314) time, the MS that can be connected to this anchor point BS by request by anchor point BS comes refining information (3) to the signal to noise ratio (snr) measurement of the signature waveform that sent by cognitive BS 306.If the MS of specific quantity has reported the higher reception SNR on this signature waveform, then can be with operating frequency f
oBe included in by the anchor point BS that is associated and offer in the Candidate Frequency tabulation of cognitive BS 306.
Carry out interferometry by cognitive BS 306 by some or all frequencies (f ∈ LCF) among request MS 316 and 318 couples of LCF of MS and come this LCF of refining.
Second step: in second step 704, cognitive BS 306 selects backup frequency f from LFC
b
The 3rd step: in the 3rd step 706, detect two triggers: (1) operating frequency does not belong to LCF; Or (2) operating frequency MS of being not suitable for connecting, and the MS that connects can't utilize another BS or other BS load too heavy and can't serve this MS.Following trigger causes cognitive BS 306 to find and switch to new operating frequency:
I. frequency f
oDo not belong to LCF; Or
Ii.MS 316 or MS 318 measures and reports on the signature waveform of cognitive BS 306 in frequency f
oThe lower SNR at place, and in the near zone of the cognitive BS 306 that is received its signature waveform by MS 316 and MS 318 with the level of expecting, do not have other (cognition or anchor point) BS.
Trigger i) inform that cognitive BS 306 may be hopeful to be connected to other MS(such as the MS 320 of cognitive BS 306), but these MS can't connect owing to its interference that observes.Trigger informs ii) that cognitive BS 306 is connected to the call quality of the MS of BS 306 may be no longer good, and do not have to provide for this MS the contiguous BS of reliable service.Thereby exist load anchor point BS(very heavy and that can't serve MS to decode to the transmission from it) situation in, also can activated trigger ii).
If detect trigger at 708 places, then cognitive BS 306 entered for the 4th step 710, otherwise cognitive BS 306 periodically repeats three steps 702,704,706 of the first step to the.
The 4th step: in the 4th step 710, cognitive BS 306 is transformed into backup frequency f
bComplexity according to the transmitter at cognitive BS 306 places has two kinds of selections:
A) in order to be transformed into backup frequency f
b, cognitive BS 306 can be in frequency f
bUpper transmission pilot tone or signature waveform.This signature can be in frequency f
oSend beyond the transmission at place.Then, be connected to the MS 316 of cognitive BS 306 and MS 318 in frequency f by cognitive BS 306 indications
bUpper execution is measured, and is reported in the SNR that MS reception antenna place is measured.If this SNR is connected to the threshold value of the MS of cognitive BS 306 greater than all, then should can indicate the MS that is connected to it to be transformed into frequency f by cognition BS 306
bAnd stop at frequency f
oThe transmission at place.Then, frequency f
bWill become new operating frequency.If by the minority MS report frequency f that is connected to cognitive BS 306
bOn SNR be lower than threshold value, then cognitive BS 306 has two selections: a) cognitive BS 306 can be with f
bFrom LCF, get rid of and repeat the step of this algorithm; Perhaps b) if with the report frequency f
oOn the MS of larger amt of low SNR compare, only have considerably less MS report f
bOn low SNR, then cognitive BS 306 still can determine to be transformed into backup frequency f
bIt should be noted that this is very rare situation, because f
bFrom selecting the LCF of refining based on the measurement of being reported by the MS that is connected to cognitive BS 306.
B) if the complexity constraint at BS transmitter place does not allow cognitive BS 306 to send simultaneously two signature waveforms on two different frequencies, then cognitive BS 306 can determine to carry out frequency f
bBlind switching, and the indication MS that is connected to it is at tuning its receiver of certain time after a while.Because MS 316 and MS 318 have reported f
bOn the relatively low value of interference, what therefore can estimate is, at f
bThe SNR of the signature waveform of upper transmission will be higher than at f
oThe SNR of the signature waveform of upper transmission.
In the FDD system, the UL backup frequency can directly be selected based on the interference variations at BS reception antenna place by cognitive BS 306.
Further strengthen
In method as discussed above, complexity is retained as disposes closely similar with current WWAN.To the unreliability of selected dummy frequencies in the overlay area of " expectation " that fix on cognitive BS 306, it may be not enough to send at single frequency.Multichannel dynamic frequency selection (M-DFS) has been proposed, as the conceptual method of selecting two or more frequencies.
We provide and attempt for the good and bad balance complexity of M-DFS and the actual design of cost at this.It should be noted that and from LCF, to select a plurality of frequencies to satisfy some standard.The example of two channel DFS can be two frequency f as discussed above
oAnd f
bSelection.
Fig. 8 is Figure 80 0 that transmission frequency (carrier wave) is shown.A kind of possible selection is that cognitive BS 306 sends in a plurality of frequencies simultaneously.Yet a kind of selection of reality is (two channel DFS are shown) periodic variation transmission frequency between a plurality of frequencies as shown in Figure 8.Two kinds of possible selections of low complex degree are:
A) cognitive BS 306 periodically changes its transmission frequency.Cognitive BS 306 is broadcasted in the time that characteristic frequency sends during it, and known to the quilt anchor point BS that is associated.The MS that is connected to anchor point BS can retune and monitor all frequencies, perhaps also can not do like this.In the situation that MS can retune to second frequency, can specific MS be tuned to all frequencies send the Dedicated Control Channel (such as Paging Indicator and ACK/NACK) that is intended to for this MS.
B) pass through at all frequency places continuously (and therefore side by side) transmission pilot tone or signature waveform so that frequency and time tracking are easier for receiver.
Option b) be suitable for utilizing receiver with low complex degree, can between different frequency, not carry out the deployment of tuning MS.If the MS receiver is supported multicarrier (having two or more receive chains), then this MS can receive at two carrier waves simultaneously.If a carrier wave in this two carrier wave has higher reliability, then should transmit control channel at this carrier wave.The example that a carrier wave in two carrier waves has the scene of higher reliability is the second deployment scenario that can use of anchor point carrier wave (that is, capacity unloading and femto deployment) therein.In this case, MS can continue the more multi-control anchor point carrier wave of interference environment is being received control channel.
Fig. 9 is the flow chart 900 of illustrative methods.The method comprises: determine at least one neighboring devices (902) from its acquired information; From the information (904) of this at least one neighboring devices acquisition about a plurality of channels; From described a plurality of channels, select a channel (906) based on the information that obtains; And send (908) at selected channel.Described at least one neighboring devices can be to determine from the tabulation of the fixture of known its physical location.Described at least one neighboring devices can be based on that the intensity of the signature waveform that sends on the wireless channel determines.Described at least one neighboring devices can be based on the wireless channel with described at least one neighboring devices communicate by letter to determine.In a kind of configuration, the method also comprises: on selected channel with information relay to another device (such as another cognitive base station).In a kind of configuration, selected channel is backup channel, and described method also comprises the selection main channel.In a kind of configuration, the information that obtains is the set that is defined as having the low channel that disturbs by described at least one neighboring devices.In a kind of configuration, described method also comprises based on the information that obtains selects extra channel from described a plurality of channels.Described transmission is also carried out at described extra channel.In a kind of configuration, describedly be sent in described channel and described extra interchannel hockets.In a kind of configuration, described transmission is included on each channel in described channel and the described extra channel continuously pilot signal transmitted, and alternately sends data on described channel and described extra channel.
In a kind of configuration, described method also is included in and initiates transmission on the first channel.Selected channel be different from the second channel of the first channel.Described method also comprises: based on predefined standard, by stopping the transmission on the first channel and initiating transmission and from the first channel switch to second channel at second channel.In a kind of configuration, the transmission on the first channel comprises the information about second channel.To be included in about the information of second channel in the transmission on the first channel and will after second channel, know second channel from the first channel switch so that receive the MS of this transmission.In a kind of configuration, described information obtains from least one neighboring devices.In a kind of configuration, the information that obtains comprises the channel that at least one neighboring devices is just sending on it.In a kind of configuration, the information that obtains comprises that at least one neighboring devices is defined as having the channel set of the interference that is lower than threshold value.In a kind of configuration, when the first channel is not in described channel set, select second channel.In a kind of configuration, when determining that based on the information that obtains second channel is better than the first channel, select second channel.In a kind of configuration, second channel is chosen as identical with the channel that is used for being transmitted by neighboring devices.In a kind of configuration, second channel is chosen as different from the channel that is used for being transmitted by neighboring devices.
In a kind of configuration, the first channel is the first dummy frequencies, and second channel is the second dummy frequencies.Described method also comprises based on the information that obtains dummy frequencies is arranged in the dummy frequencies set.In a kind of configuration, the second dummy frequencies is selected from described dummy frequencies set, and satisfies predefined standard when the first dummy frequencies is not in described dummy frequencies set.In a kind of configuration, the first dummy frequencies is the operating space frequency, and the second dummy frequencies is the reserve dummy frequencies.In a kind of configuration, described method also comprises: receive information with the signal quality relevant with the first dummy frequencies from least one wireless terminal.When being lower than, described signal quality also satisfies described predefined standard when threshold value and described at least one wireless terminal do not switch to another base station.In a kind of configuration, the information that obtains comprise from by select the following group that consists of at least one: by the selected dummy frequencies in each base station at least one adjacent base station; The first interfere information of each in described a plurality of dummy frequencies, described the first interfere information be by at least one reception antenna that is placed on an At The Height obtain to obtain the interference to wireless terminal; And each the second interfere information in described a plurality of dummy frequencies, described the second interfere information is that the measurement by the wireless terminal of being served by described at least one adjacent base station obtains from described at least one adjacent base station.In a kind of configuration, described height approximately is 2 meters.
In a kind of configuration, the information that obtains comprises the dummy frequencies of selection of each base station at least one adjacent base station and the interfere information of each dummy frequencies in described a plurality of dummy frequencies, and is arranged into described dummy frequencies set and comprises: set up the Candidate Frequency tabulation that comprises described a plurality of dummy frequencies; Based on the quantity of described at least one adjacent base station of selecting described dummy frequencies, and the rank value of determining each dummy frequencies in the described Candidate Frequency tabulation based on the described interfere information of described dummy frequencies; With the order based on the rank value of described dummy frequencies the described dummy frequencies in the described Candidate Frequency tabulation is sorted; And, by will from described Candidate Frequency tabulation, removing above the dummy frequencies of threshold value, described Candidate Frequency tabulation is retracted to described dummy frequencies set.
In a kind of configuration, selected the second dummy frequencies is the highest dummy frequencies of rank in the described dummy frequencies set.In a kind of configuration, described method also comprises: pilot signal transmitted on described the second dummy frequencies; Indicate at least one wireless terminal to determine the signal quality of described pilot signal; And each wireless terminal from described at least one wireless terminal receives the described signal quality of described pilot signal.In a kind of configuration, the described conversion from described the first dummy frequencies to described the second dummy frequencies when being higher than threshold value, the described signal quality of each wireless terminal reception from described at least one wireless terminal occurs.In a kind of configuration, described method also comprises: when described signal quality is lower than threshold value for the one or more wireless terminals in described at least one wireless terminal, remove described the second dummy frequencies from described dummy frequencies set; And, from described dummy frequencies set, select the second new dummy frequencies to replace the second dummy frequencies that removes.
Figure 10 is the module map 1000 of exemplary means 100.Exemplary means 100 comprises for determining from the module 1002 of at least one neighboring devices of its acquired information; Be used for from the module 1004 of described at least one neighboring devices acquisition about the information of a plurality of channels; Be used for selecting from described a plurality of channels based on the information that obtains the module 1006 of a channel; And for the module 1008 that sends at selected channel.
Agreement and the design of selecting and switching dummy frequencies in order to based on the information that middle collection is set in the WAN deployment are provided.In a kind of configuration, a kind of device comprises: for determining from the module of at least one neighboring devices of its acquired information; Be used for from the module of described at least one neighboring devices acquisition about the information of a plurality of channels; Be used for selecting from described a plurality of channels based on the information that obtains the module of a channel; And for the module that sends at selected channel.Aforementioned modules is the treatment system 110 that is configured to carry out the cognitive base station of the function of appointment in each module of aforementioned modules.Particularly, aforementioned modules is the processor 104 that is configured to carry out the function of appointment in each module of aforementioned modules.
The description that provides previously is in order to enable those skilled in the art to fully understand the full breadth of present disclosure.For a person skilled in the art, will be apparent to the modification of various configurations disclosed herein.Therefore, this claim is not limited to various aspects shown in this article, but consistent with the widest scope of this claim term, wherein, unless stated otherwise, quote a certain element and do not mean that " one or only one " with singulative, and can be " one or more ".All 26S Proteasome Structure and Function equivalents that run through the key element of the various aspects that present disclosure describes are incorporated herein clearly with way of reference, if these 26S Proteasome Structure and Function equivalents are known to those skilled in the art or will be known.In addition, want to offer to the public without any disclosure herein, no matter whether such disclosure clearly is documented in claims.Should be according to the 112nd article of the 6th section of key element of explaining any claim of united states patent law, unless this element be with phrase " be used for ... module " enunciate, perhaps in the method right, this element be use phrase " be used for ... step " narrate.
Claims (60)
1. the method for a radio communication comprises:
Determine at least one neighboring devices from its acquired information;
From the information of described at least one neighboring devices acquisition about a plurality of channels;
From described a plurality of channels, select a channel based on the information that obtains; And
Send at selected channel.
2. the method for claim 1, wherein described at least one neighboring devices is to determine from the tabulation of the known fixture of its physical location.
3. the method for claim 1, wherein described at least one neighboring devices is based on that the intensity of the signature waveform that sends on the wireless channel determines.
The method of claim 1, wherein described at least one neighboring devices be based on the wireless channel with described at least one neighboring devices communicate by letter to determine.
5. the method for claim 1 also is included on the selected channel information relay is installed to another.
6. the method for claim 1, wherein selected channel is backup channel, and described method also comprises the selection main channel.
7. the information that the method for claim 1, wherein obtains is the set that is defined as having the low channel that disturbs by described at least one neighboring devices.
8. the method for claim 1 also comprises based on the information that obtains and select extra channel from described a plurality of channel, and wherein, described transmission is also carried out at described extra channel.
9. method as claimed in claim 8 wherein, describedly is sent in described channel and described extra interchannel hockets.
10. method as claimed in claim 8, wherein, described transmission is included on each channel in described channel and the described extra channel continuously pilot signal transmitted, and alternately sends data on described channel and described extra channel.
11. the method for claim 1, also be included in and initiate transmission on the first channel, wherein, selected channel is the second channel that is different from described the first channel, wherein, described method also comprises: based on predefined standard, by stopping the transmission on described the first channel and initiating transmission and from described the first channel switch to described second channel at described second channel.
12. method as claimed in claim 11, wherein, the described transmission on described the first channel comprises the information about described second channel.
13. method as claimed in claim 11, wherein, described information obtains from least one neighboring devices.
14. method as claimed in claim 11, wherein, the information that obtains comprises the channel that at least one neighboring devices is just sending on it.
15. method as claimed in claim 11, wherein, the information that obtains comprises that at least one neighboring devices is defined as having the channel set of the interference that is lower than threshold value.
16. method as claimed in claim 15 wherein, is selected described second channel when described the first channel is not in described channel set.
17. method as claimed in claim 11 wherein, is selected described second channel when determining that based on the information that obtains described second channel is better than described the first channel.
18. method as claimed in claim 11 wherein, is chosen as described second channel identical with the channel that is used for being transmitted by neighboring devices.
19. method as claimed in claim 11 wherein, is chosen as described second channel different from the channel that is used for being transmitted by neighboring devices.
20. method as claimed in claim 11, wherein, described the first channel is the first dummy frequencies, described second channel is the second dummy frequencies, described method also comprises: based on the information that obtains described dummy frequencies is arranged in the dummy frequencies set, described the second dummy frequencies is selected from described dummy frequencies set, and satisfies described predefined standard when described the first dummy frequencies is not in described dummy frequencies set.
21. method as claimed in claim 20, wherein, described the first dummy frequencies is the operating space frequency, and described the second dummy frequencies is the reserve dummy frequencies.
22. method as claimed in claim 20, also comprise: receive information with the signal quality relevant with described the first dummy frequencies from least one wireless terminal, wherein, when being lower than, described signal quality also satisfies described predefined standard when threshold value and described at least one wireless terminal do not switch to another base station.
23. method as claimed in claim 20, wherein, the information that obtains comprise from by select the following group that consists of at least one: by the selected dummy frequencies in each base station at least one adjacent base station; The first interfere information of each in described a plurality of dummy frequencies, described the first interfere information be by at least one reception antenna that is placed on an At The Height obtain to obtain the interference to wireless terminal; And each the second interfere information in described a plurality of dummy frequencies, described the second interfere information is that the measurement by the wireless terminal of being served by described at least one adjacent base station obtains from described at least one adjacent base station.
24. method as claimed in claim 23, wherein, described height approximately is 2 meters.
25. method as claimed in claim 20, wherein, the information that obtains comprises the dummy frequencies of selection of each base station at least one adjacent base station and the interfere information of each dummy frequencies in described a plurality of dummy frequencies, and is arranged into described dummy frequencies set and comprises:
Foundation comprises the Candidate Frequency tabulation of described a plurality of dummy frequencies;
Based on the quantity of described at least one adjacent base station of selecting described dummy frequencies, and the rank value of determining each dummy frequencies in the described Candidate Frequency tabulation based on the described interfere information of described dummy frequencies;
With the order based on the rank value of described dummy frequencies the described dummy frequencies in the described Candidate Frequency tabulation is sorted; And
By will from described Candidate Frequency tabulation, removing above the dummy frequencies of threshold value, described Candidate Frequency tabulation is retracted to described dummy frequencies set.
26. method as claimed in claim 20, wherein, selected the second dummy frequencies is the highest dummy frequencies of rank in the described dummy frequencies set.
27. method as claimed in claim 20 also comprises:
Pilot signal transmitted on described the second dummy frequencies;
Indicate at least one wireless terminal to determine the signal quality of described pilot signal; And
Each wireless terminal from described at least one wireless terminal receives the described signal quality of described pilot signal.
28. the described conversion from described the first dummy frequencies to described the second dummy frequencies wherein, occurs in method as claimed in claim 27 when the described signal quality of each wireless terminal reception from described at least one wireless terminal is higher than threshold value.
29. method as claimed in claim 27 also comprises:
When described signal quality is lower than threshold value for the one or more wireless terminals in described at least one wireless terminal, from described dummy frequencies set, remove described the second dummy frequencies; And
From described dummy frequencies set, select the second new dummy frequencies to replace the second dummy frequencies that removes.
30. a radio communication device comprises:
For determining from the module of at least one neighboring devices of its acquired information;
Be used for from the module of described at least one neighboring devices acquisition about the information of a plurality of channels;
Be used for selecting from described a plurality of channels based on the information that obtains the module of a channel; And
For the module that sends at selected channel.
31. device as claimed in claim 30, wherein, described at least one neighboring devices is to determine from the tabulation of the known fixture of its physical location.
32. device as claimed in claim 30, wherein, described at least one neighboring devices is based on that the intensity of the signature waveform that sends on the wireless channel determines.
33. device as claimed in claim 30, wherein, described at least one neighboring devices be based on the wireless channel with described at least one neighboring devices communicate by letter to determine.
34. device as claimed in claim 30, also comprise on selected channel with the module of information relay to another device.
35. device as claimed in claim 30, wherein, selected channel is backup channel, and described device also comprises for the module of selecting main channel.
36. device as claimed in claim 30, wherein, the information that obtains is the set that is defined as having the low channel that disturbs by described at least one neighboring devices.
37. device as claimed in claim 30 comprises that also wherein, described module for sending also sends at described extra channel for the module of selecting extra channel based on the information that obtains from described a plurality of channels.
38. device as claimed in claim 37, wherein, described module for sending is in the transmission that hockets of described channel and described extra interchannel.
39. device as claimed in claim 37, wherein, described module for sending comprises for the module of pilot signal transmitted continuously on each channel of described channel and described extra channel, and the module that is used for alternately sending data on described channel and described extra channel.
40. device as claimed in claim 30, also comprise: the module that is used for initiating at the first channel transmission, wherein, selected channel is the second channel that is different from described the first channel, wherein, described device also comprises: be used for based on predefined standard, by stopping the transmission on described the first channel and initiating transmission and module from described the first channel switch to described second channel at described second channel.
41. device as claimed in claim 40, wherein, the described transmission on described the first channel comprises the information about described second channel.
42. device as claimed in claim 40, wherein, described information obtains from least one neighboring devices.
43. device as claimed in claim 40, wherein, the information that obtains comprises the channel that at least one neighboring devices is just sending on it.
44. device as claimed in claim 40, wherein, the information that obtains comprises that at least one neighboring devices is defined as having the channel set of the interference that is lower than threshold value.
45. device as claimed in claim 44 wherein, is selected described second channel when described the first channel is not in described channel set.
46. device as claimed in claim 40 wherein, is selected described second channel when determining that based on the information that obtains described second channel is better than described the first channel.
47. device as claimed in claim 40 wherein, is chosen as described second channel identical with the channel that is used for being transmitted by neighboring devices.
48. device as claimed in claim 40 wherein, is chosen as described second channel different from the channel that is used for being transmitted by neighboring devices.
49. device as claimed in claim 40, wherein, described the first channel is the first dummy frequencies, described second channel is the second dummy frequencies, described device also comprises: the module that is used for based on the information that obtains described dummy frequencies being arranged into the dummy frequencies set, described the second dummy frequencies is selected from described dummy frequencies set, and satisfies described predefined standard when described the first dummy frequencies is not in described dummy frequencies set.
50. device as claimed in claim 49, wherein, described the first dummy frequencies is the operating space frequency, and described the second dummy frequencies is the reserve dummy frequencies.
51. device as claimed in claim 49, also comprise for the module that receives information with the signal quality relevant with described the first dummy frequencies from least one wireless terminal, wherein, when being lower than, described signal quality also satisfies described predefined standard when threshold value and described at least one wireless terminal do not switch to another base station.
52. device as claimed in claim 49, wherein, the information that obtains comprise from by select the following group that consists of at least one: by the selected dummy frequencies in each base station at least one adjacent base station; The first interfere information of each in described a plurality of dummy frequencies, described the first interfere information be by at least one reception antenna that is placed on an At The Height obtain to obtain the interference to wireless terminal; And each the second interfere information in described a plurality of dummy frequencies, described the second interfere information is that the measurement by the wireless terminal of being served by described at least one adjacent base station obtains from described at least one adjacent base station.
53. device as claimed in claim 52, wherein, described height approximately is 2 meters.
54. device as claimed in claim 49, wherein, the information that obtains comprises the dummy frequencies of selection of each base station at least one adjacent base station and the interfere information of each dummy frequencies in described a plurality of dummy frequencies, and described module be used to being arranged into described dummy frequencies set comprises:
Be used for setting up the module of the Candidate Frequency tabulation that comprises described a plurality of dummy frequencies;
Be used for the quantity based on described at least one adjacent base station of selecting described dummy frequencies, and the module of determining the rank value of each dummy frequencies in the described Candidate Frequency tabulation based on the described interfere information of described dummy frequencies;
Be used for the module that the described dummy frequencies of described Candidate Frequency tabulation sorted with based on the order of the rank value of described dummy frequencies; And
Be used for described Candidate Frequency tabulation being retracted to the module of described dummy frequencies set by removing from described Candidate Frequency tabulation above the dummy frequencies of threshold value.
55. device as claimed in claim 49, wherein, selected the second dummy frequencies is the highest dummy frequencies of rank in the described dummy frequencies set.
56. device as claimed in claim 49 also comprises:
The module that is used for pilot signal transmitted on described the second dummy frequencies;
Be used to indicate at least one wireless terminal and determine the module of the signal quality of described pilot signal; And
Be used for receiving from each wireless terminal of described at least one wireless terminal the module of the described signal quality of described pilot signal.
57. device as claimed in claim 56, change when wherein, the described signal quality that receives at each wireless terminal from described at least one wireless terminal of described module for be transformed into described the second dummy frequencies from described the first dummy frequencies is higher than threshold value.
58. device as claimed in claim 56 also comprises:
Be used for when described signal quality is lower than threshold value for one or more wireless terminals of described at least one wireless terminal, from described dummy frequencies is gathered, removing the module of described the second dummy frequencies; And
Module for the second dummy frequencies that replaces from the second new dummy frequencies of described dummy frequencies set selection removing.
59. a computer program comprises:
Computer-readable medium, it comprises the code for following operation:
Determine at least one neighboring devices from its acquired information;
From the information of described at least one neighboring devices acquisition about a plurality of channels;
From described a plurality of channels, select a channel based on the information that obtains; And
Send at selected channel.
60. a device that is used for radio communication comprises:
Treatment system, it is configured to:
Determine at least one neighboring devices from its acquired information;
From the information of described at least one neighboring devices acquisition about a plurality of channels;
From described a plurality of channels, select a channel based on the information that obtains; And
Send at selected channel.
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| JP2009016900A (en) | 2007-06-29 | 2009-01-22 | Advanced Telecommunication Research Institute International | Radio device, program for causing computer to make channel selection therein and computer-readable recording medium recording this program |
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| US8145134B2 (en) * | 2008-07-22 | 2012-03-27 | At&T Intellectual Property I, L.P. | Wireless microphone beacon |
| US20110165903A1 (en) | 2008-09-05 | 2011-07-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Coordinated Transmission for Secondary Usage |
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| KR101506172B1 (en) * | 2008-11-19 | 2015-03-26 | 삼성전자주식회사 | Access control for femtocell |
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| WO2007031961A2 (en) * | 2005-09-16 | 2007-03-22 | Koninklijke Philips Electronics, N.V. | Method of recovering communication access in dynamic spectrum access wireless systems |
| CN1960575A (en) * | 2005-11-04 | 2007-05-09 | 三星电子株式会社 | Method of managing resources in a cognitive radio communication system |
| US20090221295A1 (en) * | 2008-03-03 | 2009-09-03 | Ntt Docomo Inc. | OFDMA-based co-channel femtocell |
| US20100069013A1 (en) * | 2008-09-17 | 2010-03-18 | Motorola, Inc. | Method and apparatus for distributed sensing management and control within a cognitive radio network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106028458A (en) * | 2015-03-27 | 2016-10-12 | 韩华泰科株式会社 | Method and apparatus for selecting hopping target channels |
| CN106028458B (en) * | 2015-03-27 | 2021-06-15 | 韩华泰科株式会社 | Method and apparatus for selecting a hopped target channel |
| US11770798B2 (en) | 2015-03-27 | 2023-09-26 | Hanwha Techwin Co., Ltd. | Surveillance method and apparatus |
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| US20110250858A1 (en) | 2011-10-13 |
| KR20130023243A (en) | 2013-03-07 |
| JP5571241B2 (en) | 2014-08-13 |
| KR101445814B1 (en) | 2014-11-03 |
| CN103039102B (en) | 2016-08-03 |
| JP2013524697A (en) | 2013-06-17 |
| US8787907B2 (en) | 2014-07-22 |
| WO2011127447A1 (en) | 2011-10-13 |
| EP2556690A1 (en) | 2013-02-13 |
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